He warned the pub giant could ditch some of its European products as a result – potentially including some booze – including Kopparberg cider – and Lavazza coffee.

He said: “In the current negotiations, democratically-elected politicians from the UK are dealing with unelected oligarchs from the EU.

“Since the oligarchs are not subject to judgement at the ballot box, their approach is dictated by more sectarian factors – the interests and ideology of EU apparatchiks like them, rather than residents or businesses from EU countries.

“As a result of their current posturing and threats, EU negotiators are inevitably encouraging importers like Wetherspoon to look elsewhere for supplies.

“This process is unlikely to have adverse effects on the UK economy, as companies will be able to switch to suppliers representing the 93 per cent of the world’s population which is not in the EU, but this evolution will eventually be highly damaging to the economy of the EU.

“Wetherspoon is extremely confident that it can switch from EU suppliers, if required, although we would be very reluctant to initiate such actions.”